exynos_bus_parse_of() still declares a parameter struct device_node that
is not used yet. This parameter is unnecessary and should be removed.
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
The devm_clk_get_enabled() helpers:
- call devm_clk_get()
- call clk_prepare_enable() and register what is needed in order to
call clk_disable_unprepare() when needed, as a managed resource.
This simplifies the code and avoids the calls to clk_disable_unprepare().
While at it, use dev_err_probe consistently, and use its return value
to return the error code.
Link: https://lore.kernel.org/lkml/20240510094034.12493-1-linux.amoon@gmail.com/
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Commit adf8238ef4 ("ARM: dts: exynos: move exynos-bus nodes out of soc
in Exynos4412") changed the order of the exynos-bus nodes, what results
in different probe order of the Exynos Bus devices. Although the driver
properly handles the deferred probe and all devices seems to be finally
properly registered, this change revealed some kind of a bug related to
PPMU counters registration and passive governor operation. Usually in 1
of 10 boots this results in complete board freeze during loading of the
kernel modules.
To avoid that freeze, ensure that the Exynos PPMU driver is already
loaded before the Exynos Bus driver starts probing.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
The driver can match only via the DT table so the table should be always
used and the of_match_ptr does not have any sense (this also allows ACPI
matching via PRP0001, even though it might not be relevant here).
drivers/devfreq/exynos-bus.c:504:34: error: ‘exynos_bus_of_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Pull operating performance points (OPP) updates for 5.20-rc1 from Viresh
Kumar:
"- Make dev_pm_opp_set_regulators() accept NULL terminated list (Viresh
Kumar).
- Add dev_pm_opp_set_config() and friends and migrate other
users/helpers to using them (Viresh Kumar).
- Add support for multiple clocks for a device (Viresh Kumar and
Krzysztof Kozlowski).
- Configure resources before adding OPP table for Venus (Stanimir
Varbanov).
- Keep reference count up for opp->np and opp_table->np while they are
still in use (Liang He).
- Minor cleanups (Viresh Kumar and Yang Li)."
* tag 'opp-updates-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: (43 commits)
venus: pm_helpers: Fix warning in OPP during probe
OPP: Don't drop opp->np reference while it is still in use
OPP: Don't drop opp_table->np reference while it is still in use
OPP: Remove dev{m}_pm_opp_of_add_table_noclk()
PM / devfreq: tegra30: Register config_clks helper
OPP: Allow config_clks helper for single clk case
OPP: Provide a simple implementation to configure multiple clocks
OPP: Assert clk_count == 1 for single clk helpers
OPP: Add key specific assert() method to key finding helpers
OPP: Compare bandwidths for all paths in _opp_compare_key()
OPP: Allow multiple clocks for a device
dt-bindings: opp: accept array of frequencies
OPP: Make dev_pm_opp_set_opp() independent of frequency
OPP: Reuse _opp_compare_key() in _opp_add_static_v2()
OPP: Remove rate_not_available parameter to _opp_add()
OPP: Use consistent names for OPP table instances
OPP: Use generic key finding helpers for bandwidth key
OPP: Use generic key finding helpers for level key
OPP: Add generic key finding helpers and use them for freq APIs
OPP: Remove dev_pm_opp_find_freq_ceil_by_volt()
...
Now that we have a central API to handle all OPP table configurations,
migrate the set-regulators family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
instead of making the callers keep the two parameters in sync, which
creates an opportunity for bugs to get in.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Steven Price <steven.price@arm.com> # panfrost
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The dev_pm_opp_put_*() APIs now accepts a NULL opp_table pointer and so
there is no need for us to carry the extra check. Drop them.
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This patch adds registration of a child platform device for the exynos
interconnect driver. It is assumed that the interconnect provider will
only be needed when #interconnect-cells property is present in the bus
DT node, hence the child device will be created only when such a property
is present.
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Previously, devfreq core support 'devfreq-events' property in order to get
the devfreq-event device by phandle. But, 'devfreq-events' property name is
not proper on devicetree binding because this name doesn't mean
the any h/w attribute.
The devfreq-event core hand over the rights to decide the property name
for getting the devfreq-event device on devicetree. Each devfreq-event driver
will decide the property name on devicetree binding and then pass
the their own property name to devfreq_event_get_edev_by_phandle function.
And change the prototype of devfreq_event_get_edev_count function
because of used deprecated 'devfreq-events' property.
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Previously, devfreq core support 'devfreq' property in order to get
the devfreq device by phandle. But, 'devfreq' property name is not proper
on devicetree binding because this name doesn't mean the any h/w attribute.
The devfreq core hand over the right to decide the property name
for getting the devfreq device on devicetree. Each devfreq driver
will decide the property name on devicetree binding and pass
the their own property name to devfreq_get_devfreq_by_phandle function.
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Adding an error log makes it easier to trace the function's error path.
Because the error code may be rewritten on return, print error code here.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
The exynos_bus_profile_init process may fail, but the devfreq event device
remains enabled. Call devfreq_event_disable_edev on the error return path.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Improve code readability by changing the goto statements
as well as eliminating a few more goto statements (related to return
paths). Moreover, remove unused header file and adds a missing <linux/of.h>.
Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
[cw00.choi: Edit patch title and description]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This patch adds a new exynos_bus_profile_init_passive()
extracted from exynos_bus_probe() for devfreq device using passive governor.
Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
[cw00.choi: Edit description to indicate that function is for devfreq device
using passive governor]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This patch adds a new exynos_bus_profile_init() extracted
from exynos_bus_probe() for devfreq device using simple_ondemand governor
like parent devfreq device.
Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
[cw00.choi: Edit description to indicate that new function is
for parent devfreq device]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reuse opp core code for setting bus clock and voltage. As a side
effect this allow usage of coupled regulators feature (required
for boards using Exynos5422/5800 SoCs) because dev_pm_opp_set_rate()
uses regulator_set_voltage_triplet() for setting regulator voltage
while the old code used regulator_set_voltage_tol() with fixed
tolerance. This patch also removes no longer needed parsing of DT
property "exynos,voltage-tolerance" (no Exynos devfreq DT node uses
it). After applying changes both functions exynos_bus_passive_target()
and exynos_bus_target() have the same code, so remove
exynos_bus_passive_target(). In exynos_bus_probe() replace it with
exynos_bus_target.
Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Regulators should be enabled before clocks to avoid h/w hang. This
require change in exynos_bus_probe() to move exynos_bus_parse_of()
after exynos_bus_parent_parse_of() and change in error handling.
Similar change is needed in exynos_bus_exit() where clock should be
disabled before regulators.
Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Based on 2 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 4122 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Force all Exynos buses to safe operation points before doing the system
reboot operation. There are board on which some aggressive power saving
operation points are behind the capabilities of the bootloader to properly
reset the hardware and boot the board. This way one can avoid board crash
early after reboot.
This fixes reboot issue on OdroidU3 board both with eMMC and SD boot.
Reported-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
